netdev - Re: [PATCH bpf-next 3/3] bpf, doc: add RISC-V to filter.txt

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Date:   Mon, 4 Feb 2019 21:16:24 +0100
From:   Björn Töpel <bjorn.topel@...il.com>
To:     Daniel Borkmann <daniel@...earbox.net>
Cc:     linux-riscv@...ts.infradead.org, ast@...nel.org,
        Netdev <netdev@...r.kernel.org>,
        Palmer Dabbelt <palmer@...ive.com>,
        Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH bpf-next 3/3] bpf, doc: add RISC-V to filter.txt

Den mån 4 feb. 2019 kl 21:09 skrev Daniel Borkmann <daniel@...earbox.net>:
>
> On 02/03/2019 12:51 PM, bjorn.topel@...il.com wrote:
> > From: Björn Töpel <bjorn.topel@...il.com>
> >
> > Update Documentation/networking/filter.txt to mention RISC-V.
> >
> > Signed-off-by: Björn Töpel <bjorn.topel@...il.com>
>
> Nit: in Documentation/sysctl/net.txt under bpf_jit_enable there is also
> a concrete list of eBPF/cBPF JITs, would be good to add riscv64 there as
> well.
>

Thanks for pointing this out! I'll do a v2.


Björn

> >  Documentation/networking/filter.txt | 16 +++++++++-------
> >  1 file changed, 9 insertions(+), 7 deletions(-)
> >
> > diff --git a/Documentation/networking/filter.txt b/Documentation/networking/filter.txt
> > index 01603bc2eff1..b5e060edfc38 100644
> > --- a/Documentation/networking/filter.txt
> > +++ b/Documentation/networking/filter.txt
> > @@ -464,10 +464,11 @@ breakpoints: 0 1
> >  JIT compiler
> >  ------------
> >
> > -The Linux kernel has a built-in BPF JIT compiler for x86_64, SPARC, PowerPC,
> > -ARM, ARM64, MIPS and s390 and can be enabled through CONFIG_BPF_JIT. The JIT
> > -compiler is transparently invoked for each attached filter from user space
> > -or for internal kernel users if it has been previously enabled by root:
> > +The Linux kernel has a built-in BPF JIT compiler for x86_64, SPARC,
> > +PowerPC, ARM, ARM64, MIPS, RISC-V and s390 and can be enabled through
> > +CONFIG_BPF_JIT. The JIT compiler is transparently invoked for each
> > +attached filter from user space or for internal kernel users if it has
> > +been previously enabled by root:
> >
> >    echo 1 > /proc/sys/net/core/bpf_jit_enable
> >
> > @@ -603,9 +604,10 @@ got from bpf_prog_create(), and 'ctx' the given context (e.g.
> >  skb pointer). All constraints and restrictions from bpf_check_classic() apply
> >  before a conversion to the new layout is being done behind the scenes!
> >
> > -Currently, the classic BPF format is being used for JITing on most 32-bit
> > -architectures, whereas x86-64, aarch64, s390x, powerpc64, sparc64, arm32 perform
> > -JIT compilation from eBPF instruction set.
> > +Currently, the classic BPF format is being used for JITing on most
> > +32-bit architectures, whereas x86-64, aarch64, s390x, powerpc64,
> > +sparc64, arm32, riscv (RV64G) perform JIT compilation from eBPF
> > +instruction set.
> >
> >  Some core changes of the new internal format:
> >
> >
>